Method of forming boxes consisting of two parts one of which has a curved wall



NOV. 1, 1932. SCHMIEDEL 1,886,055

- METHOD OF' FORMING BOXES CONSISTING OF TWO PARTS ONE OF WHICH HAS A CURVED WALL Filed Jan. 9, 1930 2 Sheets-Sheet 1 Fig.1

NOV; 1, 1932. J SCHWEDEL 1,886,055

METHOD OF FORMING BOXES CONSISTING Of Two PARTS ONE OF WHICH HAS A CURVED WkLL Filed Jan. 9. 1930 2 Shuts-Sheet 2 Fig.2

' separately and to combine them subsequently,

Patented Nov. 1,.1932

UNITED STATES PATENT OFFICE JOHANNES SGHMIEDEL, OF DRESDEN, GERMANY, ASSIGNOR TO THE FIRM UNI- VERSELLE CIGARETTENMASCHINEN-FABRIK J. G. MULLER & 00., OF DRESDEN,

enammr v METHOD OF FORMING BOXES CONSISTING OF TWO PARTS ONE OF WHICH HAS A CURVE!) WALL Application filed January 9, 1980, Serial No. 419,576, and in Germany January 11, 1929.

The present invention relates to a method of producing boxes consisting of two parts one of which has a curved wall.

It is known to the prior art how to manufacture the body portion and the top of a box both steps being carried out mechanically. It is further known to provide the combined box portions on the same machine with an edging strip. However, if boxes with curved walls are to be produced at present, curving must take place prior, to combining the box portions, and as the box portions are not provided with corner connections, either the corners must be jointed, or curving effected by the hot process. On the other hand, the walls of the finished boxes may be curved by a special operation after being cut open, butspecial machinery is required for this step at present.

According to the invention, the entire process of producing a box, including the curving step, can be carried out in one operatron by means of a machine tool without employing corner joints or applying the hot drawing method by producing both box portions simultaneously on the same machine, by combining them and providing them with the edging strip, whereupon the work is cut open along three of the side edges of the box along the joint between the upper and lower box portions, the cover turned up and the work passed in this condition to the curving means which may be of any suitable well known type of dies which srve to curve the cover top in any desired manner, so that the work comes out of the machine in a perfectly finished state.

The process according to the invention can be applied by employing the known working From the box blank pile holding devices 1 and 2 the box blanks are pushed in known manner by the rams 3 and 4 in front of the shaping channels 5 and 6,the pile holderlcontaining the blanks for the bottom portion of the box and the pile holder 2 those for the cover. The stamp 7 provided with the glued box neck 2 and controlled in the known manner passes then through the shaping channel 5 while bending rectangularly the projecting side flaps of the blank Su, and the stamp 8 enters the shaping channel 6 while turning the side flaps of the blank. So by known controlling means, the shaft in cooperation with the correspondingly controlled counterstamp 9 imparting at the same time a sort of barrel-like shape to the box top. The stamp 7 continues its motion topush the work into the vertical shaft 10 wherein the work is drawn oil by strippers of the known type on the return of the stamp 7; the stamp 8, on the other hand, returns and corresponding strippers draw off the work disposed on the stampin the form of a cap in front of a duct 11. The work drops byits own weight into a horizontal conveying shaft 12 or it can be moved down by a stamp 13, as indicated in Fig. 1. In this conveying shaft the work pieces are brought together from both sides by the rams 14 and 15, moving at each stroke for the thickness of a work piece, in front of a vertical conveyin shaft 16. A vertically controlled ram 1? now pushes the assembled work downwardly, and the lower side of the work strikes the edging strip B provided with adhesive matter and introduced into the slot 16 of the conveying shaft in the known manner, the edging strip being bent up rectangularly and positioned on the side walls of the work. The work is moved forward step by step and comes within range of the folding finger 18 which on being rojected places the short projecting end 0 the edging strip on to the work. After the return of this folding finger another folding finger 19 comes out which bends the still projecting end of the edging strip down to the Work and presses it on to the latter. Having been provided with the edging strip, the work comes in contact with two circular knives 20, 21 driven and arranged in the known manner and adapted to cut open the work on the two opposite sides. At the lower end of the shaft 16 the work is guided by known means in the direction of the arrow in Fig. 2 into a conveying duct 22 wherein it is met by another circular knife 23 which cuts open the third side. The edging strip may be introduced into the duct or shaft 16 in various ways. Fig. 4 showing one mechanism for efl'ecting the introduction of said edging stri' into the channel or shaft 16.

he pile holder 24 for the edging strips B is shown in proper relationship with respect to the vertical channel 16. Said pile is continuously urged toward the upper open end of holder 24 by a spring a. The holder 24 is mounted on two rods Z) which are slidably suppprted in guides 0, whereby the holder may reciprocated laterally. Reciprocation may be effected by a link controlled from a rotating crank disk 7" rotatable in the direction of the arrow on the shaft g. The li s d at the upper end of holder 24 prevent tlie pile from being pushed out of the holder.

In order to remove the top-most strip from the pile and to gum the same, a gunnning segment mounted on a shaft h is provided. Said shaft is driven from shaft 9 by a suitable chain or other drive means. In its path of travel. the outer edge of said segment v', which is curved, contacts with a gumining roller 25 which dips into a gum bath 26.

Associated with the channel 16, are grip pers I; mounted on a shaft k. Located ad Jacent the opening in said channel are platforms l onto which the grippers k lay the edging strip after picking the same from the gumming segment. Shaft is is suitably driven.

The operation is as follows The gumming segment which contacts during its path of travel with gunnning roller 25 cooperates with holder 24 and said segment removes the uppermost strip from said holder and carries it to the full line posltlon shown in the Figure 4, where gripper k seizes it and carries it to the platform Z ready or use.

I claim 1. The method of producing boxes consistmg of t-wo parts and having a curved wall, comprising forming each part of the box simultaneously, combining the two parts and binding said two box parts together. cutting open the bound box parts along side edges and curving one'face of one of the box parts.

2. A method of producing boxes consisting of two parts and having a curved wall, comprising forming each part of the box simultaneously and curving a wall of one of the box parts, combining the two parts, binding the combined parts together and cutting open the bound box parts along side edges.

3. A method of producing boxes consisting of two parts and having a curved wall comprising forming each part of the box simultaneously, combining the two box parts, binding the combined parts together, cutting open the bound box parts along side edges and then curving one face of one of the box parts.

4. A method of producing boxes consisting of two box parts and having a curved wall, comprising forming each part of the box slnmltaneously, combining the two box parts, binding the combined parts together by laying a gummed edging strip along the side edges of said parts, cutting open the bound box parts along side edges and curving one face of one of the box parts.

5. A method of producing boxes consisting of two parts and having a curved wall comprising forming each part of the box simultaneously, curving a wall of one of the box parts during formation, combining the two box parts, binding the combined parts together by laying a gummed edging strip along the side edges of said combined parts,

and cutting open the bound box parts along side edges.

6. A method of producing boxes consisting of two parts and having a curved wall comprising forn'iing each part of the box simultaneously combining the two parts, binding the two parts together by laying a gunnned edging strip along the side edges of said combined parts, cutting open the bound box parts along side edges and then curving one face of one of the box parts.

In testimony whereof I affix my signature.

'JOHANNES SCIIMIEDEL. 

